As I had encountered a number of bugs that were bugging me, I decided to try and delete, then reinstall Pathfinder Adventures on my iPad to see whether the bugs I encountered were due to a corrupted installation. I thought I'd share the result, because other people might be interested to learn what happens if you reinstall the game, e.g. if you buy a new iPad and need to transfer your applications:

 

The Good:

• After reinstallation the Rise of the Runelords Bundle that I had bought appeared as soon as I entered the store, I didn't even need to use the Restore button. I still own all the adventures and characters.
• Likewise my gold was automatically restored on reinstallation.
• All the cards I had bought via treasure chests are still there in the Gallery/Vault.

The Bad:

• All character progress in both story and quest mode is gone.
• All progress on the world map in story mode is gone.

TLDR version: If you reinstall or switch to a new iPad, you'll keep the things you bought, but lose the progress you played for.

It's not that you loose progress. It is still on the device you gained that progress on.

They must have gone for local storage of character info (hackable??) rather than fill up a database server.

Purhased and gold in stored online. Characters in the device. So if you remove old and reinstall you character progress and groups Are in bit heaven. The online storage for characters is coming, but not tested yet fully enough for release.